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The world has become aware of its reliance on petroleum during the last several decades. It significantly impacts daily actions carried out by humans. Most of the world's untapped oil resources are primarily found offshore. Many industries have expanded their initial Investigation and Extraction activities with Onshore Platforms to include Earth Probe oceanic surface, realizing the direction of oil and gas technology. It had to contend with the deeper difficulties of the sea, one of the "last frontiers" on Earth. The oil and gas sector has shifted its primary development focus from onshore to offshore in the modern era. Throughout the past century, there has been a transition from land to sea. The following Offshore technology applications have been innovated. Semi-floating and jack up Drilling platforms; offshore platforms; and Dynamically stabilized drilling vessels, FSO, FPSO, and FDPSO. Offshore technology developed to overcome progressively harsh and difficult situations. To access a larger portion of the reservoir, wells could be drilled in several directions from one location on a Stationary platform or buoyant rig. Subsea technology has advanced to a depth of 3,000 meters below the sea's surface. The development of these subsea prospects at depths of up to 3,000 meters needed exceptional engineering abilities, qualified equipment, and a laser-like concentration on dependability. The subsea oil and gas industry was facing changes in global markets, with operating in emerging nations such as West Africa becoming crucial for sustained profitability in the long run. Numerous prosperous submarine industries were compelled to move their portion of the billions of year in US dollars allocated to subsea projects. Subsea well intervention is one of these technologies' developments as it moves toward offshore due to the necessity for various sectors to fulfill the pressing need to enhance and boost the productivity of oil well productions. By definition, subsea intervention is any form of intervention carried out underwater or below the surface. However, the writer discovered that different sources had different definitions of the term. From Wikipedia Instructor Loh Way Lam's Deep-Sea System Design Lecture Notes, the writer learned that Subsea intervention is more closely associated with well maintenance, subsea intervention. Yong Bai defined subsea intervention as all forms of work carried out underwater by utilizing ROV and introduced the term ROV Deployment. In this paper, the writer will discuss the portrayal of subsea intervention from both references. The chart below illustrates the portrayal of subsea intervention from both references falls into to help the reader understand the differences between the two definitions.